# DiagPro+ vs SpectralScan Audio Analyzer

The clearest difference is in-app purchases: DiagPro+ at none against SpectralScan Audio Analyzer's 1. SpectralScan Audio Analyzer's advantage is update cadence (every 8 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SpectralScan Audio Analyzer sells 1 one-off in-app purchase. DiagPro+ asks for nothing beyond the download.

DiagPro+ ships an update monthly, SpectralScan Audio Analyzer every 8 days. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | DiagPro+ | SpectralScan Audio Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (9 ratings)](https://appshunter.io/ios/app/spectralscan-audio-analyzer/id6762024331/reviews)** |
| Number of ratings | — | **9** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 16 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FIELDS-IQ LLC](https://appshunter.io/developer/1884210066) | [Otsukare AB](https://appshunter.io/developer/1892516192) |

## What reviewers say

### DiagPro+

[App page](https://appshunter.io/ios/app/diagpro-plus/id6760949575)

**Features:** macOS Compatibility

**In-app purchases:** none


### SpectralScan Audio Analyzer

[App page](https://appshunter.io/ios/app/spectralscan-audio-analyzer/id6762024331)

Transform your device into a professional audio analysis tool. Visualize sound in real-time with a high-resolution spectrum, perform precise sine sweep measurements, and analyze frequency content over time. Save, compare, and export your audio data.

**Highlights:** Real-time frequency spectrum visualization, Sine sweep measurements for system response, Spectrogram for time-frequency analysis, Comparison and overlay of multiple measurements, Export data as CSV or PNG, Pro features for advanced analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpectralScan Pro | $9.99 | one-time |


## Frequently asked questions

### Is DiagPro+ free?

DiagPro+ is free to download, with no in-app purchases.

### Is SpectralScan Audio Analyzer free?

SpectralScan Audio Analyzer is free to download, with in-app purchases available.

### Do DiagPro+ or SpectralScan Audio Analyzer have ads?

Neither DiagPro+ nor SpectralScan Audio Analyzer shows ads.

### Which is updated more often, DiagPro+ or SpectralScan Audio Analyzer?

DiagPro+ ships an update monthly, and SpectralScan Audio Analyzer every 8 days. Most recently, DiagPro+ was updated on September 21, 2026 and SpectralScan Audio Analyzer on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*